Quote Originally Posted by sseilmnop View Post
I have 174,000 miles on the 4t65e-HD, how long is an automatic suppose to last? I've had 4 or 5 chevy 350 4 bolt main motors rebuilt and making descent power over the years and I've never had a stock tranny go over 100,000 miles. the rear wheel drive tranny can be built to take the power but so can the 4t65e-HD. Stock is good to 300hp just like the rear wheel drive stock tranny.
Ok so your trans has been going for 174K and that's with the 4t65e-HD... so for a daily driver I could push the engine well over 300+ HP and I should be able to get 170K+ miles on it too? If the 4t65e-HD can handle everything I wanna throw at it then great. Its just with everything I had been reading about the transmissions in these cars, it couldn't even handle the stock 200HP over a stretch of time. But if what everyone here is trying to say is true that the engine is great and a rebuilt 4t65e-HD trans can handle everything I wanna throw at it, then great. That's all I needed to be reassured of.